Enhanced Supercapacitance of Hydrous Ruthenium Oxide/Mesocarbon Microbeads Composites toward Electrochemical Capacitors

摘要

A facile hydrothermal strategy was proposed to synthesize RuO2·nH2O/mesocarbon microbeads (MCMBs) composites. Further physical characterizations revealed that RuO2·nH2O nanoparticles (NPs) were well dispersed upon the surfaces of the MCMB pretreated in 6 M KOH solution. Electrochemical data indicated that the RuO2·nH2O/MCMB composites owned higher electrochemical utilization of RuO2species, better power property, and better electrochemical stability, compared with the single RuO2phase. The good dispersion of RuO2·nH2O NPs and enhanced electronic conductivity made the H+ions and electrons easily contact the RuO2·nH2O phase for efficient energy storage at high rates.